Some studies characterize bubbles as speculative phenomena in which investors pay more than the value of the asset’s dividend stream in anticipation of receiving a profit by selling the asset later. We study the number of consumption opportunities as a necessary condition for the existence of bubbles. Our model permits continuous trading over a finite horizon, but it also assumes investors cons...

The aim of this paper is to compare statistical properties of a bubble period with those of the anti-bubble period in stock markets. We investigate the statistical properties of daily data for the Nikkei 225 index in the 28-year period from January 1975 to April 2003, corresponded to the periods of bubbles and anti-bubbles. We divide the time series into two parts, the period of inflation (or b...

Why do asset price bubbles continue to appear in various markets? This paper provides an overview of recent literature on bubbles, with significant attention given to behavioral models and rational models with frictions. Unlike the standard rational models, the new literature is able to model the common characteristics of historical bubble episodes and offer insights for how bubbles are initiat...

We study and generalize in various ways the model of rational expectation (RE) bubbles introduced by Blanchard and Watson in the economic literature. Bubbles are argued to be the equivalent of Goldstone modes of the fundamental rational pricing equation, associated with the symmetry-breaking introduced by non-vanishing dividends. Generalizing bubbles in terms of multiplicative stochastic maps, ...

We construct a model of rational bubbles under credit frictions and show that bubbles held by banks can generate large credit expansions followed by financial crisis. The size of boom-bust is somewhat larger than the case in which savers directly hold bubbles. Thus massive credit exansion during booms can be interpreted as an early warning indicator of possible subsequent crisis.

In this research we examine the ability of West’s bubble test [1] in detecting speculative bubbles using Brock’s (1982) [2] intertemporal general equilibrium model of asset pricing as the basis for a simulation study. In this setting, (1) the economy, by construction is efficient and produces the maximally possible amount of welfare for society, and (2) asset prices reflect the utility-maximizi...

We provide a microfounded framework for the welfare analysis of macroprudential policy within model rational bubbles. For this, we posit an overlapping generation where productivity and credit supply are subject to random shocks. find that when real interest rates lower than rate growth, financed bubbles may be improving because their role as buffer in channeling excessive inefficient investmen...